diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index fa5f558..ba2806d 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -1,3 +1,8 @@
+If you would like to contribute to the development of oslo's libraries,
+first you must take a look to this page:
+
+   https://specs.openstack.org/openstack/oslo-specs/specs/policy/contributing.html
+
 If you would like to contribute to the development of OpenStack, you must
 follow the steps in this page: